Emergencies: Allergic Reaction
A severe allergic reaction (anaphylaxis) can be life threatening. Caused by exposure to insect and animal venoms, plant products, medications.

Emergencies: Dehydration
In all situations of high altitude, extreme environmental heat or cold, or vigorous exercise, people underestimate their need for fluids.

Emergencies: Heat-Related Illness
Consider heat-related illness a medical emergency. The human body does not tolerate elevated body temperature well, or extreme elevation at all.

Emergencies: High Altitude Disorders
Acute mountain sickness can begin as a nuisance, but its presence indicates that the sufferer is on the edge of becoming much more severely ill.

Emergencies: Hypothermia
The level of hypothermia determines whether you can effectively rewarm a person in the field. Always keep the victim from becoming colder.

Emergencies: Lightning Strike
A person who has been struck by lightning is not "electrified."

Emergencies: Near-Drowning
A person who has been submersed under water and who is still alive is said to have been "near-drowned."